package day03;

public class OperDemo5 {
    public static void main(String[] args) {
        int age = 40;
        System.out.println("age=");//age=
        System.out.println(age);//40
        System.out.println("age="+age);//age=40
        System.out.println("我今年"+age+"岁了");//我今年40岁了

        String name = "wkj";//声明字符串型变量name,并赋值为wkj
        System.out.println("大家好，我叫"+name);//大家好，我wkj
        System.out.println("大家好，我叫"+name+",今年"+age+"岁了");//大家好，我叫wkj,今年40岁了

        System.out.println(10+20+""+30);//3030------String
        System.out.println(""+10+20+30);//102030------String
        System.out.println(10+20+30+"");//60---------string

    }
}
